Carbureter.



J. R. PRICE.

CARBURETER.

APPLICATION FILED FEB. 20, 1906.

944,048. Patented Dec. 21, 1909.

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J. R. PRICE. CARBURETER. APPLICATION FILED FEB. 26, 1906.

94 L048. Patented Dec. 21, 1909.

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CARBURETER.

Specification of Letters Patent.

Application filed February 26, 1906. Serial No. 302,968.

To all whom it may concern:

Be it known that I, J OI-IN R. PRICE, a citizen of the United States,residing at Newark, in the county of Essex and State of New Jersey, haveinvented a new and useful Carbureter, of which the following is aspecification.

The objects of this invention are to provide an improved carburetorparticularly adapted for use with motors for driving automobiles; tosecure a mixture of gasolene and air which shall be of substantiallyuniform quality or degree of richness; to regulate for this purpose theadmission of air to the mixing chamber; to effect such regulationautomatically, and independent of the throttle; to secure a simpleconstruction, and one which can be adapted to carbureters already inuse, and to obtain other advantages and results as may be brought out inthe following description.

The invention consists in the improved carbureter, substantially as willbe hereinafter described and finally set forth in the claims. I f tReferring to the accompanying drawings, in which like numerals ofreference indicate corresponding parts in each of the several figures,Figure 1 is a vertical central sectional view of my improved carbureter,shown entire with a float chamber or constant level device for thegasolene feed; Fig. 2 is a cross-section upon line at, Fig. 1; Fig. 3 isa view of the vaporizer, partly in central vertical section, looking ina direction at right angles to that of Fig. 1; Fig. 4, is a plan of'thevaporizer, and Fig. 5 is a crosssection as on line y, Fig. 3, with thethrottle almost entirely closed, and a certain partition and screensremoved.

In said drawings, 1 designates a float chamber, having a float 2 thereincontrolling an inlet. valve 3, cooperating with a valve seat 4 in thebottom of the tank. The valve seat 4 communicates with a supplyconnection 5, which may be attached to any suitable reservoir or othermeans (not shown),

.of feeding gasolene to the chamber 1. At

the bottom of the connection 5 is a drain cock 6, and extending from thechamber 1 is a feed pipe 7, with anupwardly directed exlatented Dec. 21,1909.

tremity 8, from which the gasolene passes into the vaporizing chamber.All the parts thus far described are old in the art, and it is in thevaporizer, next to be described, that my invention I particularlyinheres. Said vaporizer comprises a body portion or ing 9, with acylindrical interior in which case fits. a rotatable throttle tube-10,-preferably formed of sheet metal. A cover 1 secured to the top ofthe body portion 9, overlies the edges 12, of the upper open end of thethrottle tube 10, and is segmentally cut away for a part of itsperiphery, as at 13, to accommodate a handle piece 1 L, fixed to thesaid throttle tube.

At the upper part of the body portion 9, is a lateral throttle openingor outlet 15, from which a tube or connection (notshown) may lead to themotor, and the throttle tube 10, has a corresponding port 16, adapted tobe turned into or out of coincidence with the said opening 15.Preferably this port 16, is pearshaped, with its small end 17, extendingrearwardly as the tube 10 is turned to close the throttle, so as toenable finer adjustment in closing.

At the bottom 18, of the throttle tube is a central depending extension19, which receives the extremity 8, of the feed pipe 7, and forms anannular air passage'or inlet around the same. At one side of said airinlet 19, a sector of the throttle-tube floor is cut away as at 20, andin the bottom of the casing 9, is a similar opening 21, the relationof-suid apertures to each other and to the throttle port 16, being suchthat when construction, the cover 11. has an aperture Ewhich is tappedto receive an uxteriorly threaded sleeve 2:3, providing at its bottominterior slideway for a piston 29, upon the,

a valve-seat 23, facing the vaporizing chamber. A valve 24, normallyengages the said -lar sheath 2?", inclosing" the valve stem 25. Thesleeve 22, has also its interior threaded,

and an inner sleeve 28, screws into said outer sleeve 22, furnishing atits upper part an end of the valve stem 25. The inner end of 1 saidinner'sleeve 28, has arms 30', extending radially inward and. supportingan annular spring seat 31, around the valve stein sheath 27. Acooperating spr ng cap 32, is

. adjacent to the piston 29, and between said spring seat3l, and springcap 32, are ar rangedspiral sprin s 33, 34, one inside the other, andone, preferably the outer one 34, being lighter and slightly longer thanthe inner one 33. Obviously, therefore; when the valve 24, is opened bythe suction of the motor, it opens against the one or both of thesprings33, 34, and the tension of said springs, and thus the opening of thevalve,

can be regulated by screwing the inner sleeve 28,in the outer sleeve 22.When the outer light spring 34, alone engages the cap 32,

the valve will open very easily, but by increasing the tension of saidspring, and by bringing the stifi spring 33, into play, a

, much less sensitive action of the valve is obtained, as may bedesired.The automatic admission of air can thus be regulated.

F or ingressof air, the sleeves 22 and 29,

have each a circumferential series of aper tures, 35 or 36, the numberof openings in the two sleeves differing, as six in one and seven'in theother, so as to insurethe registration of at least a p0rt1on of them,irrespective of the adjustment of the springs, as shown in Fig. 2. Suchadjustment is slight in the direction of the length of the sleeves, andthe holes 35,36,- are easily made large enough so that they will not becarried past A cap 37, closes the outer end of the inner sleeve 29,having a vent 38, so as to not unduly restrict movement of the piston29, and yet secure a cushioning of the same to prevent its pulsationunder the suction of the.

motor. Jam rings 39,40, upon the inner and outer sleeves 29,22,respectively, serve to lock them in place when adjusted.

I have shown depending from the cover 11, into the vaporizing chamber, aflaring funnel-like air guide 41, whichhas its contracted end closelyaround the end of the. outer sleeve 22, which projects into thevaporizing chamber. Downwardly contracting frusto-conical screens 42,42, are also shown arranged in the lower part of the throttle tube 10,to aiford evaporating surface for the gasolene, and, lastly, at aboutthe level of the lower part of the throttle port 16, is a substantiallyhorizontal partition 43, with a crescent-shaped recess 44,'in the edgethereof adjacent to the said throttle port. This partition'may be,employed to divide the suction of the motor tooperate both on thegasolene supply at the bottom and the auxiliary air supply at the top,of

the vaporizer, and in any desired propor- 7a tion.

In operation, the aininlet valve having been suitably adjusted, it willbe seen that with thethrottleopen only just enough to keep the motor,running, as shown in Fig. ,5, the air-inletat the-bottom of thevaporizer is,open so as to admit air, and obviously at this time thereis not enough suction to.

operate the inlet valve at the top of the-.-

vaporiz-ler. As the throttle is .opened far-'85 ther, the auxiliaryinlet at the bottom of the vaporizer is closed, and the said valve atthe top comes into play automatically. urithermore, since the said-valveoperates by the suction, regardless of'the throttle position, it will beunderstood that the auxiliary air supply may. diminish without any closing of the throttle, as for instance when an automobile encounters ahill orthe load upon a.mot'or is otherwise increased. The function of myauxiliary 'air inlet at the bottom of the throttle tube is to vary theair inlet' independently of the automatic valve, or at such times" asthe said/automatic, valve is j not in operation, as for instance whenthe-motor is running with the throttle nearly closed and there is notenough suction from the ex .gineto operate the automatic. valve. Underthese conditions, the mixture may be.

too rich, as only minimum power iswanted,fl

and the simplest way to secure a weaker mixture is by increasing the airinlet at the bottom of the throttle. tube, and thus both di- 'luting thegasolene fed and also'reducing the feed by reducing the suction on it.This -result is accomplished by the means I have shown and described,viz.,auxiliary' air inlet means adapted to open as the suction of theengine decreases and to close as the suction v of the engine increases.lVhen the throttle is nearly closed, the auxiliary. air inlet isopeningand thereby reducing the gasolene feed suctio as well as diluting themixture. When the t1 'tle is opened again, the auxiliary air inletcloses, thus giving the maximum gasolene feed, and the usual or upperauxiliary air valve is operated by the en the suction to regulate thesupply of air to the mixture.

While the detail mechanical construction of my invention can be varied,'I' prefer a construction such as I have shown whichcan be applied tozmany carbureters already in use by plyiiforming a central screwthreaded opening in the top, and recessing itsbedgeto provide forturning the throttle tu e.

Having thus described the invention what I claim as new is:

1. In a carbureter, a vaporizing chamber casing having a. lateralthrottle opening, a bottom central aperture and an'auxiliary air inlet,a rotatable throttle tube fitting said casing and having an extensionfitting the bottom aperture, said tube'having ports one adapted to turninto. coincidence with the sleeve, a valve for sai auxiliary air inletas the other passes out of registration with the throttle opening, acover for the vaporizing chamber casing provided with air inlet meansadapted to be automatically operated'by suction throu h the throttle,and a gasolene feed tube in t e said throttle tube extension providing asurrounding air space.

2. In a carbureter, a vaporizing chamber casing having a lateralthrottle opening and a lower auxiliary air inlet, a throttle tubefitting said casing and having ports one adapted to turn intocoincidence with the auxiliary air inlet as the other passes out ofregistration with the throttle opening, a cover for the-casingsegmentally recessed or cut away at its periphery to expose the upperedge of the throttle tube, handle means upon said exposed portion of thethrottle tube for turning the same, air inlet means upon the said coveradapted to be 0 erated by suction through the throttle, an gasolene feedmeans.

3. 'IIhe' combination with a carbureter body portion having a throttleand gasolene feed means, of a sleeve mounted in said body portion andbeing interiorly threaded and forming at its inner end a valve seat, aninner sleeve screwin within said outer valve seat having a stem providedwith a head slidably fittin the inner sleeve, and a spring sup ortefi atone end on said inner sleeve and a apted to enga c said valve to seatthe same, said sleeves firming an air inlet to the carbureter controlledby said valve.

4. The combination with a carbureter body portion having a. throttle andgasolene feed means, of a sleeve mounted in said body portion and beinginteriorly threaded and forming at its inner end a va e seat, an innersleeve screwing within said outer sleeve, a valve for said valve seathaving a stem provided with a piston head fitting the inner sleeve, acap upon the end of said inner sleeve adapted to confine the air andform a cushion for said piston, and a spring sup orted at one end onsaid inner sleeve and a apted to engage said valve to seat the same,said inner and outer sleeves having between the said valve and itspiston head apertures for the admission of air. a

5. The, combination with a carbureter body portion having a throttle andgasolene feed means, of a sleeve mounted in said body portion and beinginteriorly threaded and forming at its inner end a valve seat, an innersleeve screwing within said outer sleeve, a valve for said valve seathaving a stem provided with a piston head fitting the inner sleeve, acap upon the end of said inner sleeve adapted to confine the air andform a cushion for said piston, and a spring supported at one end onsaid inner sleeve and adapted to engage said valve to seat the same, thesaid outer and inner sleeves having between the piston and thecarbureter ody portion circumferential series of holes intheir walls,unequal innumber, and some of which always register.

6. The combination with a carbureter body portion having a throttle andgasolene feed means, of a sleeve mounted in said body portion and beinginteriorly threaded and forming at its inner end a valve seat, an innersleeve screwing within said outer seat, a valve for said valve seathavin 'a stem provided with a head slidably fitting the inner sleeve,said sleeves formin an air inlet to the carbureter controlled y saidvalve, and springs one within the other surrounding the valve stembetween the said spring seat and valve stem head, one of said other. I

7. A carbureter having a casing with a main bottom air inlet, anauxiliary bottom .air port and a lateral throttle opening, a throttletube rotatably disposed in the easing and provided with a segmental slotin its bottom adapted to cooperate with the said auxiliary air port andalso with a side opening adapted to coincide with the lateral port ofthe casing, said slot ada ted to move into coincidence with the auxiiary air inlet as the side opening of thethrottle tube moves out ofregistration with the throttle opening of the casing and vice versa,means for feeding gasolene into the body of the carbureter through saidmain bottom opening, and an automaticallyoperating auxilia valvearranged on the carbureter to admlt from said chamber, a'throttle forsaid discharge, and means for restricting the said mechanically operatedauxiliary air inlet by opening of the dischar e and opening saidmechanically o crate auxiliary air inlet by restricting o the discharge.

air to the latter and controllable solely b v sleeve and forming at itsinner end a spring springs being heavier and-shorter than the air tosaid chamber, a discharge leading 9. In a carbureter, the combinationwith through the carbureter increases, and means a vaporizing chamberhaving a main air for restricting the other auxiliary air inlet inlet,gasolene feed means, and a throttle by opening of the throttle.

controlling the discharge from said chamber, JOHN R. PRICE. 5 of twoauxiliary air inlets to said chamber Witnesses:

independent of each other, one of said inlets ETHEL B. REED,

adapted to open as the suction of the motor E F. C. CHRISTIANSEN.

